GENERAL DESCRIPTION

TheHXJ4871 is a bridge-connected audio power amplifier capable of delivering typically 3W of continuous average power to a 3Ωloadwith 10% (THD) from a 5 V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since theHXJ4871 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems.

TheHXJ4871 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism. The unity-gain stableHXJ4871 can be configured by external gain-setting resistors.

FEATURES

◆No output coupling capacitors, bootstrap capacitors or snubber circuits are necessary

◆Small Outline or DIP packaging

◆Unity-gain stable

◆External gain configuration capability

SPECIFICATIONS

◆PO at 10% THD+N, 1kHz:

◆3Ω load, 3W (typ.)，4Ω load,
2.5W (typ.)，8Ω load,
1.5 W (typ.).

◆Shutdown current: 0.6 μA (typ.)

◆Supply voltage range:
2.0 V to
6.0 V

◆THD at 1 kHz at 1W continuous average output power into 8 Ω: 0.5% (max.)

ABSOLUTE MAXIMUM RATINGS(TA=25℃)

◆SupplyVoltage:6.0 V

◆SupplyTemperature:−65 ?Cto+150 ?C

◆InputVoltage: −0.3 VtoVDD+ 0.3 V

◆PowerDissipation (DIP): 500 mV

◆PowerDissipation (SOP): 300 mV

OPERATING RATINGS

◆TemperatureRange: −40?C≤TA ≤85?C

◆SupplyVoltage:
2.0 V≤VDD≤5.5V

TYPICAL APPLICATIONS

◆Portable computers

◆Desktop computers

◆Low voltage audio systems